act7000asc Aeroflex Circuit Technology, act7000asc Datasheet - Page 17

• Manufacturer Part Number: act7000asc
• Description: Standard Products Act7000asc 64-bit Superscaler Microprocessor
• Manufacturer: Aeroflex Circuit Technology

Mode bit
10..9
SCD7000A Rev B
4..1
7..5
0
8
Table 16 – Boot Time Mode Stream
Reserved: Must be zero
Write-back data rate
0: DDDD
1: DDxDDx
2: DDxxDDxx
3: DxDxDxDx
4: DDxxxDDxxx
5
6: DxxDxxDxxDxx
7: DDxxxxxxDDxxxxxx
8: DxxxDxxxDxxxDxxx
9-15:Reserved
SysClock to Pclock Multiplier
Mode bit 20 = 0 / Mode bit 20 = 1
0: Multiply by 2/x
1: Multiply by 3/x
2: Multiply by 4/x
3: Multiply by 5/2.5
4: Multiply by 6/x
5: Multiply by 7/3.5
6: Multiply by 8/x
7: Multiply by 9/4.5
Specifies byte ordering. Logically ORed
with BigEndian input signal.
0: Little endian
1: Big endian
Non-Block Write Control
00: R4000 compatible non-block writes
01: Reserved
DDxxxxDDxxxx
Description
17
10..9 con’t
Mode bit
255..26
14..13
17..16
19..18
23..21
Table 16 – Boot Time Mode Stream (cont)
11
12
15
20
24
25
10: pipelined non-block writes
11: non-block write re-issue
Timer Interrupt Enable/Disable
0: Internal Timer interrupt gated to IP[7]
1: External INT5* gated to IP[7]
Reserved: Must be zero
Output driver strength - 100% = fastest
00: 67% strength
01: 50% strength
10: 100% strength
11: 83% strength
Reserved must be zero
System configuration identifiers- software
visible in processor Config[21..20] register
Reserved: Must be zero
Pclock to SysClock multipliers.
0: Integer multipliers (2,3,4,5,6,7,8,9)
1:
Reserved: Must be zero
JTLB Size.
0: 48 dual-entry
1: 64 dual-entry
On-chip secondary cache control.
0: Disable
1: Enable
Reserved: Must be zero
Half integer multipliers (2.5,3.5,4.5)
Description